Artificial intelligent assistant

porphyrian

porˈphyrian, a.1 Obs.
  [f. med.L. porphyri-us (see porphyry) + -an.]
  Of, or composed of, porphyry.

1638 Sir T. Herbert Trav. (ed. 2) 62 Foure hundred porphirian pillars. 1687 A. Lovell tr. Thevenot's Trav. i. 124 Many lovely Pillars of Porphyrian Marble.

Oxford English Dictionary

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